I have a SIP softphone talking to an IP PBX through a PIX.
I can register with the PBX with the extension, but I have no voice either way.
no fixup protocol sip udp 5060
no fixup protocol sip 5060
Otherwise, I cannot register with the PBX.
I have static (inside,outside) interface <inside IP> netmask 255.255.255.255 0 0
access-list inbound permit udp any any eq 5060
access-list inbound permit udp any any range 10000-20000